Question 1

What is the force on a proton sitting midway between a pair of parallel conducting plates that sit at potentials of -17 V and 55 V,respectively? Their separation distance is 1.5 cm.

Accepted Answer

A)   1.5  ×	imes×  10-15 N
B)   1.5  ×	imes×  10-16 N
C)   7.7  ×	imes×  10-16 N
D)   3.8  ×	imes×  10-16 N
E)   3.0  ×	imes×  10-16 N

Question 2

A parallel plate capacitor has a paper dielectric having dielectric strength 8.0 kV/mm and dielectric constant 3.0.The plate area is 3000 cm2 and the plate separation is 0.50 mm.What is the highest voltage that can be applied to this capacitor?

Accepted Answer

A)   15 V
B)   1.2  ×	imes×  102 V
C)   4.0  ×	imes×  102 V
D)   4.0  ×	imes×  103 V
E)   1.2  ×	imes×  104 V

Question 3

The unit V is the same as a

Accepted Answer

A)   N/m.
B)   J/N.
C)   C/m.
D)   J/C.
E)   C/N.

Question 4

A pair of conductors are connected with a wire.Which of the following statements is necessarily true?

Accepted Answer

A)   The conductors are at the same electric potential
B)   The electric field at the surface of each conductor is the same
C)   The conductors each have the same charge
D)   There is no net charge on the conductors and wire

Question 5

The SI unit for electric potential energy is equivalent to

Accepted Answer

A)   N·m.
B)   V·C.
C)   N/m.
D)   C·m2.
E)   none of these choices are correct

Question 6

A hollow conducting sphere of radius 12 cm had a charge of 18  μ\muμ C placed on it.What is the potential at the center of the sphere?

Accepted Answer

A)   0 V
B)   24 V
C)   1.4  ×	imes×  106 V
D)   1.6  ×	imes×  106 V
E)   infinite

Question 7

Two large equipotent surfaces are flat and parallel and separated by a relatively small distance compared to their size.One surface is at 25.0 V and the other is at 33.0 V.The surfaces are 1.25 cm apart.What is the magnitude of the electric field midway between the surfaces?

Accepted Answer

A)   25.0 V/m
B)   29.0 V/m
C)   33.0 V/m
D)   6.40  ×	imes×  102 V/m
E)   1.00  ×	imes×  103 V/m

Question 8

A parallel plate capacitor with an air dielectric is attached to a voltage source and charged.The voltage source is removed,and then the plates are separated to double their previous distance.What happens to the potential difference between the plates when they are separated?

Accepted Answer

A)   it doubles
B)   it quadruples
C)   it halves
D)   it is diminished by a factor of 4
E)   it stays the same

Question 9

The electric field in a given location points along the -x axis.This means that

Accepted Answer

A)   At that location,the potential is positive
B)   At that location,the potential decreases as one moves toward negative values of x.
C)   At that location,the potential decreases as one moves toward positive values of x.
D)   At that location,the potential is negative

Question 10

If electrons are accelerated from rest in an electron gun by sending them through a potential difference of 1000 V,what is the speed of the electrons?

Accepted Answer

A)   9.41  ×	imes×  106 m/s
B)   1.33  ×	imes×  106 m/s
C)   1.87  ×	imes×  107 m/s
D)   1.97  ×	imes×  106 m/s
E)   6.22  ×	imes×  106 m/s

Question 11

A parallel plate capacitor with circular plates having radius 0.07 m is used to store energy.If it is desired to store 12  ×	imes×  10-6 J in this capacitor,what must the separation distance be for a voltage of 1.5 kV?

Accepted Answer

A)   0.64 cm
B)   0.41 cm
C)   2.5 cm
D)   1.3 cm

Question 12

A pair of parallel conducting plates have potentials of -17 V and 55 V,respectively.How much work needs to be done on an electron in order to move it from the 55 V to the -17 V plate?

Accepted Answer

A)   6.1  ×	imes×  10-18 J
B)   -6.1  ×	imes×  10-18 J
C)   1.2  ×	imes×  10-17 J
D)   -1.2  ×	imes×  10-17 J

Question 13

A hollow conducting sphere of radius 12 cm had a charge of 18  μ\muμ C placed on it.What is the potential at the surface of the sphere?

Accepted Answer

A)   0 V
B)   24 V
C)   2.7  ×	imes×  105 V
D)   1.4  ×	imes×  106 V
E)   1.6  ×	imes×  106 V

Question 14

An air-filled 3.0 nF capacitor is charged to 8.0 V.If the plate separation is 100  μ\muμ m,what is the energy density in the electric field?

Accepted Answer

A)   57 J/m3
B)   280 J/m3
C)   57 mJ/m3
D)   28 mJ/m3
E)   more than 50 J/m3

Question 15

What is the potential at a distance of 0.0529 nm from a proton?

Accepted Answer

A)   13.6 no
B)   -13.6 no
C)   27.2 V
D)   -27.2 no
E)   9.11 pC

Question 16

A hollow conducting sphere of radius 12 cm had a charge of 18  μ\muμ C placed on it.What is the potential 20 cm from the center of the sphere?

Accepted Answer

A)   0 V
B)   15 V
C)   73 V
D)   8.1  ×	imes×  105 V
E)   4.1  ×	imes×  105 V

Question 17

A 22  μ\muμ F capacitor is charged to 100 V.What is the energy stored by the capacitor?

Accepted Answer

A)   0.22 J
B)   0.11 J
C)   22 J
D)   11 J
E)   44 mJ

Question 18

Three point charges,q1,q2,and q3,are arranged so the potential energy for the pair q1 and q2 is 0.12 J and for the pair q2 and q3 is 0.23 J.If the total potential energy of the arrangement is 0.60 J,what is the potential energy of the pair q1 and q3?

Accepted Answer

A)   0.11 J
B)   0.35 J
C)   0.25 J
D)   0.95 J
E)   Insufficient information is given for a unique answer

Question 19

A conducting sphere of radius 20 cm has a charge Q placed on it producing a field of magnitude E0 at its surface.More charge is added to the surface until the magnitude of the field at the surface is 2 E0.How much charge was added to the surface?

Accepted Answer

A)   Q/2
B)   Q
C)   2 Q
D)   1.4 Q
E)   3 Q

Question 20

A parallel plate capacitor has a paper dielectric having dielectric strength 8.00 kV/mm and dielectric constant 3.00.The plate area is 3000 cm2 and the plate separation is 0.500 mm.If 10.0 V are applied to this capacitor,what is the charge on the capacitor?

Accepted Answer

A)   50.0  μ\muμ C
B)   42.0 nC
C)   160 nC
D)   16.0 nC
E)   42.0  μ\muμ C

Exam 17: Electric Potential

The unit V is the same as a

Correct AnswerverifiedShow Answer

A parallel plate capacitor with an air dielectric is attached to a voltage source and charged.The voltage source is removed,and then the plates are separated to double their previous distance.What happens to the potential difference between the plates when they are separated?

Correct AnswerverifiedShow Answer

A hollow conducting sphere of radius 12 cm had a charge of 18 μ\muμ C placed on it.What is the potential 20 cm from the center of the sphere?

Correct AnswerverifiedShow Answer

Two large equipotent surfaces are flat and parallel and separated by a relatively small distance compared to their size.One surface is at 25.0 V and the other is at 33.0 V.The surfaces are 1.25 cm apart.What is the magnitude of the electric field midway between the surfaces?

Correct AnswerverifiedShow Answer

Three point charges,q1,q2,and q3,are arranged so the potential energy for the pair q1 and q2 is 0.12 J and for the pair q2 and q3 is 0.23 J.If the total potential energy of the arrangement is 0.60 J,what is the potential energy of the pair q1 and q3?

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An air-filled 3.0 nF capacitor is charged to 8.0 V.If the plate separation is 100 μ\muμ m,what is the energy density in the electric field?

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A 22 μ\muμ F capacitor is charged to 100 V.What is the energy stored by the capacitor?

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What is the force on a proton sitting midway between a pair of parallel conducting plates that sit at potentials of -17 V and 55 V,respectively? Their separation distance is 1.5 cm.

Correct AnswerverifiedShow Answer

A parallel plate capacitor with circular plates having radius 0.07 m is used to store energy.If it is desired to store 12 ×\times× 10-6 J in this capacitor,what must the separation distance be for a voltage of 1.5 kV?

Correct AnswerverifiedShow Answer

A parallel plate capacitor has a paper dielectric having dielectric strength 8.0 kV/mm and dielectric constant 3.0.The plate area is 3000 cm2 and the plate separation is 0.50 mm.What is the highest voltage that can be applied to this capacitor?

Correct AnswerverifiedShow Answer

A parallel plate capacitor has a paper dielectric having dielectric strength 8.00 kV/mm and dielectric constant 3.00.The plate area is 3000 cm2 and the plate separation is 0.500 mm.If 10.0 V are applied to this capacitor,what is the charge on the capacitor?

Correct AnswerverifiedShow Answer

The SI unit for electric potential energy is equivalent to

Correct AnswerverifiedShow Answer

A hollow conducting sphere of radius 12 cm had a charge of 18 μ\muμ C placed on it.What is the potential at the center of the sphere?

Correct AnswerverifiedShow Answer

If electrons are accelerated from rest in an electron gun by sending them through a potential difference of 1000 V,what is the speed of the electrons?

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The electric field in a given location points along the -x axis.This means that

Correct AnswerverifiedShow Answer

What is the potential at a distance of 0.0529 nm from a proton?

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A pair of parallel conducting plates have potentials of -17 V and 55 V,respectively.How much work needs to be done on an electron in order to move it from the 55 V to the -17 V plate?

Correct AnswerverifiedShow Answer

A pair of conductors are connected with a wire.Which of the following statements is necessarily true?

Correct AnswerverifiedShow Answer

A conducting sphere of radius 20 cm has a charge Q placed on it producing a field of magnitude E0 at its surface.More charge is added to the surface until the magnitude of the field at the surface is 2 E0.How much charge was added to the surface?

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A hollow conducting sphere of radius 12 cm had a charge of 18 μ\muμ C placed on it.What is the potential at the surface of the sphere?

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

A hollow conducting sphere of radius 12 cm had a charge of 18 $\mu$ C placed on it.What is the potential 20 cm from the center of the sphere?

Correct Answer
verified

Correct Answer
verified

Three point charges,q₁,q₂,and q₃,are arranged so the potential energy for the pair q₁ and q₂ is 0.12 J and for the pair q₂ and q₃ is 0.23 J.If the total potential energy of the arrangement is 0.60 J,what is the potential energy of the pair q₁ and q₃?

Correct Answer
verified

An air-filled 3.0 nF capacitor is charged to 8.0 V.If the plate separation is 100 $\mu$ m,what is the energy density in the electric field?

Correct Answer
verified

A 22 $\mu$ F capacitor is charged to 100 V.What is the energy stored by the capacitor?

Correct Answer
verified

Correct Answer
verified

A parallel plate capacitor with circular plates having radius 0.07 m is used to store energy.If it is desired to store 12 $\times$ 10^-6 J in this capacitor,what must the separation distance be for a voltage of 1.5 kV?

Correct Answer
verified

A parallel plate capacitor has a paper dielectric having dielectric strength 8.0 kV/mm and dielectric constant 3.0.The plate area is 3000 cm² and the plate separation is 0.50 mm.What is the highest voltage that can be applied to this capacitor?

Correct Answer
verified

A parallel plate capacitor has a paper dielectric having dielectric strength 8.00 kV/mm and dielectric constant 3.00.The plate area is 3000 cm² and the plate separation is 0.500 mm.If 10.0 V are applied to this capacitor,what is the charge on the capacitor?

Correct Answer
verified

Correct Answer
verified

A hollow conducting sphere of radius 12 cm had a charge of 18 $\mu$ C placed on it.What is the potential at the center of the sphere?

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

A conducting sphere of radius 20 cm has a charge Q placed on it producing a field of magnitude E₀ at its surface.More charge is added to the surface until the magnitude of the field at the surface is 2 E₀.How much charge was added to the surface?

Correct Answer
verified

A hollow conducting sphere of radius 12 cm had a charge of 18 $\mu$ C placed on it.What is the potential at the surface of the sphere?

Correct Answer
verified